Quantification of protein abundance in each condition. Quantification of protein abundance in each condition, on a relative scale that is comparable between conditions of a protein but not between proteins. (a) Study of breast cancer cell lines, protein SLC44A2. (b) Study of subjects with osteosarcoma, Entrez ID 28299. X-axis: condition. Y-axis: model-based estimate of protein log-intensity. Vertical lines are the 95% confidence intervals. The selected proteins are the same as in Figure 3.